28917161 has 8 divisors (see below), whose sum is σ = 35590464. Its totient is φ = 22879440.

The previous prime is 28917151. The next prime is 28917179. The reversal of 28917161 is 16171982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28917161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28917101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158795 + ... + 158976.

It is an arithmetic number, because the mean of its divisors is an integer number (4448808).

Almost surely, 2^28917161 is an apocalyptic number.

It is an amenable number.

28917161 is a deficient number, since it is larger than the sum of its proper divisors (6673303).

28917161 is a wasteful number, since it uses less digits than its factorization.

28917161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317791.

The product of its digits is 6048, while the sum is 35.

The square root of 28917161 is about 5377.4678985560. The cubic root of 28917161 is about 306.9388660467.

It can be divided in two parts, 289 and 17161, that multiplied together give a square (4959529 = 2227²).

The spelling of 28917161 in words is "twenty-eight million, nine hundred seventeen thousand, one hundred sixty-one".